I was going to be like... why would a printer sound be on this list? Then I clicked it and began listening to the original sound, followed by the remixes and usages of the sound. Yep, I understand now.

Hard to say as outright utility determines how useful a sound may be. However, a series where one made a rocket launch sound effect out of a microphone with a condom over it impressed me greatly. Would be hard-pressed not to say it's the top sound in my book. It just works.

In fact i love to listen to "cultural" recordings. Languages and music is something special, and although i don't travel that much, i try to record that kind of stuff if i can get close to it. But so far this is the biggest gem i've come across, on freesound.